Engine-CodesGMC – C124F 2018 GMC Sierra

C124F 2018 GMC Sierra Code - Lateral Acceleration Sensor Circuit Low Voltage

Quick Answer

The C124F diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates a problem with the lateral acceleration sensor circuit registering low voltage. Common causes include Faulty lateral acceleration sensor, Wiring issues such as loose connections or damaged wiring harness, Corrosion or water damage to the sensor or its connectors. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
C124F 2018 GMC Sierra indicates Lateral Acceleration Sensor Circuit Low Voltage.
Common causes
Common causes include Faulty lateral acceleration sensor, Wiring issues such as loose connections or damaged wiring harness, Corrosion or water damage to the sensor or its connectors.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Table of contents Created and updated by William Orellana on Aug 19, 2024
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Code C124F 2018 GMC Sierra Description

The C124F diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates a problem with the lateral acceleration sensor circuit registering low voltage. This sensor is responsible for measuring the lateral (sideways) acceleration of the vehicle, which is crucial for stability control systems and overall handling performance. When the sensor detects low voltage, it can lead to inaccuracies in the readings provided to the vehicle's electronic control unit (ECU). This can result in compromised stability control, traction control, and potentially affect other safety systems that rely on accurate lateral acceleration data.

OBDII Code C124F 2018 GMC Sierra - Lateral Acceleration Sensor Circuit Low Voltage
C124F 2018 GMC Sierra Code - Lateral Acceleration Sensor Circuit Low Voltage

Common Causes of C124F 2018 GMC Sierra

  1. Faulty lateral acceleration sensor.
  2. Wiring issues such as loose connections or damaged wiring harness.
  3. Corrosion or water damage to the sensor or its connectors.
  4. Issues with the ECU receiving or interpreting the sensor data.
  5. Electrical system malfunctions affecting the sensor circuit.

Symptoms of C124F 2018 GMC Sierra

  1. Illuminated stability control or traction control warning light on the dashboard.
  2. Increased body roll or instability during cornering.
  3. Decreased responsiveness of stability control systems.
  4. Erratic behavior of the vehicle's electronic stability program (ESP).
  5. Vehicle may feel less stable during sudden maneuvers or lane changes.

How to Fix C124F 2018 GMC Sierra

  1. Begin by diagnosing the issue with a scan tool to confirm the C124F code and pinpoint the specific cause.
  2. Inspect the lateral acceleration sensor and its wiring for any visible damage or corrosion. Replace or repair as necessary.
  3. Check the connections between the sensor and the ECU for tightness and proper contact.
  4. Clear the DTC from the ECU memory and perform a road test to verify that the issue has been resolved.
  5. If the problem persists, further diagnostics may be required to identify any underlying electrical issues or ECU malfunctions.

Cost to Fix C124F 2018 GMC Sierra

The typical repair cost for addressing a lateral acceleration sensor circuit low voltage issue can vary depending on the specific cause of the problem and the extent of repairs needed. In general, parts for sensor replacement or wiring repairs could range from $100 to $300, while labor costs may add another $100 to $200. Overall, the total repair cost could fall within the range of $200 to $500. Keep in mind that these estimates are approximate, and actual costs can vary based on factors such as location, labor rates, and any additional components that may need to be replaced. It is recommended to consult with a qualified mechanic or auto repair shop for a more accurate cost assessment.

Tech Notes for C124F 2018 GMC Sierra





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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about C124F 2018 GMC Sierra Code

1. What are the common symptoms of OBDII code C124F in a 2018 GMC Sierra?

The common symptoms of OBDII code C124F in a 2018 GMC Sierra include the traction control light or stability control light illuminating on the dashboard, loss of traction control functionality, and potential issues with the vehicle's stability while driving.

2. What causes the Lateral Acceleration Sensor Circuit Low Voltage error code C124F in a 2018 GMC Sierra?

The C124F error code in a 2018 GMC Sierra is typically triggered by a malfunction in the lateral acceleration sensor circuit, which could be caused by damaged wiring, a faulty sensor, or a poor electrical connection.

3. How serious is the C124F code in a 2018 GMC Sierra?

While the C124F code may not cause immediate harm to the vehicle, it can affect the overall stability control system, impacting the handling and safety of the vehicle. It is recommended to address this issue promptly to avoid further complications.

4. Can I continue driving my 2018 GMC Sierra with the C124F code present?

It is not advisable to continue driving your 2018 GMC Sierra with the C124F code present, as it can compromise the vehicle's stability control system. It is recommended to have the issue diagnosed and repaired as soon as possible.

5. How can I diagnose the C124F code in my 2018 GMC Sierra?

Diagnosing the C124F code in a 2018 GMC Sierra typically involves using a diagnostic scanner to retrieve the specific fault codes, inspecting the lateral acceleration sensor and its wiring for any visible damage, and testing the sensor's voltage and resistance.

6. What are some repair tips for fixing the C124F code in a 2018 GMC Sierra?

Repairing the C124F code in a 2018 GMC Sierra may involve repairing or replacing damaged wiring, replacing the lateral acceleration sensor, or addressing any loose electrical connections. It is recommended to follow the manufacturer's diagnostic and repair procedures.

7. Can a DIY enthusiast fix the C124F code in a 2018 GMC Sierra?

While some DIY enthusiasts may have the skills to diagnose and repair the C124F code in a 2018 GMC Sierra, it is a complex issue that may require specialized tools and expertise. It is recommended to consult a professional mechanic for accurate diagnosis and repair.

8. How much does it cost to repair the C124F code in a 2018 GMC Sierra?

The cost of repairing the C124F code in a 2018 GMC Sierra can vary depending on the underlying cause of the issue, the extent of the damage, and the labor rates in your area. It is advisable to obtain quotes from multiple mechanics for an accurate estimate.

9. Will resetting the OBDII code clear the C124F error in a 2018 GMC Sierra?

Resetting the OBDII code may temporarily clear the C124F error in a 2018 GMC Sierra, but it is likely to reappear if the underlying issue is not addressed. It is best to diagnose the root cause of the problem and perform the necessary repairs.

10. Is the lateral acceleration sensor the only component that can trigger the C124F code in a 2018 GMC Sierra?

While the lateral acceleration sensor is a common culprit for the C124F code in a 2018 GMC Sierra, other factors such as damaged wiring, poor connections, or issues with the stability control system can also trigger this error code. Comprehensive diagnosis is recommended.

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